IA-32 architecture paging
page size and used paging structures |
CR0.PG |
CR4.PAE |
CR4.PSE |
PDE.PS |
physical address size |
page size |
CR3 points to |
PDPT |
PD |
PT |
0 |
x |
x |
x |
32bit |
--- |
--- |
--- |
--- |
--- |
1 |
0 |
0 |
x |
32bit |
4KB |
PD |
--- |
1024 PDEs (32bit) |
1024 PTEs (32bit) |
1 |
0 |
1 |
0 |
32bit |
4KB |
PD |
--- |
1024 PDEs (32bit) |
1024 PTEs (32bit) |
1 |
0 |
1 |
1 |
32bit or 36bit |
4MB |
PD |
--- |
1024 PDEs (32bit) |
1024 PTEs (32bit) |
1 |
1 |
x |
0 |
36bit |
4KB |
PDPT |
4 PDPTEs (64bit) |
512 PDEs (64bit) |
512 PTEs (64bit) |
1 |
1 |
x |
1 |
36bit |
2MB |
PDPT |
4 PDPTEs (64bit) |
512 PDEs (64bit) |
512 PTEs (64bit) |
virtual address translation |
P S |
P A E |
|
3 1 |
3 0 |
2 9 |
2 8 |
2 7 |
2 6 |
2 5 |
2 4 |
2 3 |
2 2 |
2 1 |
2 0 |
1 9 |
1 8 |
1 7 |
1 6 |
1 5 |
1 4 |
1 3 |
1 2 |
1 1 |
1 0 |
9 |
8 |
7 |
6 |
5 |
4 |
3 |
2 |
1 |
0 |
4 K B |
0 |
PDE # |
PTE # |
offset |
4 M B |
PDE # |
offset |
4 K B |
1 |
PDP- TE # |
PDE # |
PTE # |
offset |
2 M B |
PDP- TE # |
PDE # |
offset |
4KB/4MB paging structures |
entry |
3 1 |
3 0 |
2 9 |
2 8 |
2 7 |
2 6 |
2 5 |
2 4 |
2 3 |
2 2 |
2 1 |
2 0 |
1 9 |
1 8 |
1 7 |
1 6 |
1 5 |
1 4 |
1 3 |
1 2 |
1 1 |
1 0 |
9 |
8 |
7 |
6 |
5 |
4 |
3 |
2 |
1 |
0 |
4KB PDE |
page table base |
AVL |
G |
0 |
D |
A |
P C D |
P W T |
U / S |
W / R |
P |
4MB PDE |
page base |
reserved |
P A T |
AVL |
G |
1 |
D |
A |
P C D |
P W T |
U / S |
W / R |
P |
page base (low) |
reserved |
p. b. (high) |
4KB PTE |
page base |
AVL |
G |
P A T |
D |
A |
P C D |
P W T |
U / S |
W / R |
P |
4KB/2MB paging structures |
entry |
6 3 |
6 2 |
6 1 |
6 0 |
5 9 |
5 8 |
5 7 |
5 6 |
5 5 |
5 4 |
5 3 |
5 2 |
5 1 |
5 0 |
4 9 |
4 8 |
4 7 |
4 6 |
4 5 |
4 4 |
4 3 |
4 2 |
4 1 |
4 0 |
3 9 |
3 8 |
3 7 |
3 6 |
3 5 |
3 4 |
3 3 |
3 2 |
3 1 |
3 0 |
2 9 |
2 8 |
2 7 |
2 6 |
2 5 |
2 4 |
2 3 |
2 2 |
2 1 |
2 0 |
1 9 |
1 8 |
1 7 |
1 6 |
1 5 |
1 4 |
1 3 |
1 2 |
1 1 |
1 0 |
9 |
8 |
7 |
6 |
5 |
4 |
3 |
2 |
1 |
0 |
PDPTE |
reserved |
page directory base |
page directory base |
AVL |
res. |
P C D |
P W T |
res. |
P |
4KB PDE |
reserved |
page table base |
page table base |
AVL |
G |
0 |
D |
A |
P C D |
P W T |
U / S |
W / R |
P |
2MB PDE |
reserved |
page base |
page base |
reserved |
P A T |
AVL |
G |
1 |
D |
A |
P C D |
P W T |
U / S |
W / R |
P |
4KB PTE |
reserved |
page base |
page base |
AVL |
G |
P A T |
D |
A |
P C D |
P W T |
U / S |
W / R |
P |
#PF exception error code |
1 5 |
1 4 |
1 3 |
1 2 |
1 1 |
1 0 |
9 |
8 |
7 |
6 |
5 |
4 |
3 |
2 |
1 |
0 |
reserved |
R S V |
U / S |
W / R |
P |
|